31238100313 has 16 divisors (see below), whose sum is σ = 35831808000. Its totient is φ = 26677309392.

The previous prime is 31238100263. The next prime is 31238100319. The reversal of 31238100313 is 31300183213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31238100313 is a prime.

It is a super-2 number, since 2×31238100313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31238100319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3209268 + ... + 3218986.

It is an arithmetic number, because the mean of its divisors is an integer number (2239488000).

Almost surely, 2^31238100313 is an apocalyptic number.

It is an amenable number.

31238100313 is a deficient number, since it is larger than the sum of its proper divisors (4593707687).

31238100313 is a wasteful number, since it uses less digits than its factorization.

31238100313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11364.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31238100313 its reverse (31300183213), we get a palindrome (62538283526).

The spelling of 31238100313 in words is "thirty-one billion, two hundred thirty-eight million, one hundred thousand, three hundred thirteen".